Coal mine crushing device
By combining the design of the hammering mechanism and the rolling roller, the existing coal mine crushing equipment has solved the problem of improper handling of special-shaped coal blocks and unsuitable particle size, and efficient coal block crushing and particle size control are achieved, improving the operating stability of the equipment and coal utilization rate.
Patent Information
- Application Number
- CN202422327917.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-09-24
AI Technical Summary
Existing coal mine crushing devices are difficult to effectively deal with the problems of special shapes of raw coal blocks and large crushing particles, which leads to excessive load on the equipment or difficulty in controlling the particle size.
The design of a combination of coarse crushing components and fine crushing components is adopted, and the combination of hammering mechanism and rolling rollers can achieve multiple crushing and screening of coal blocks, including the coordinated work of the hammering mechanism and rolling rollers, to avoid the problems of motor overload and particle size not meeting the standards.
It improves the crushing effect, reduces the risk of equipment overload, ensures the uniformity of the particle size of the coal block and meets the requirements, and improves the utilization rate of coal.
Smart Images
Figure CN223221635U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of coal mine crushing, in particular to a coal mine crushing device. Background Art
[0002] The coal blocks mined from coal mines are often large in size. These large coal blocks cannot directly meet the needs of subsequent production, processing and use. By crushing the screened coal blocks or large coal blocks through coal mine crushing equipment to make them into small particles suitable for transportation, storage or further processing, the utilization rate of coal can be improved and the needs of different users can be met.
[0003] Commonly used coal mine crushing devices include roller shredders, jaw crushers and hammer crushers, but they also have the following problems:
[0004] Among them, the double-roll shredder has a good crushing effect, but the large or spherical raw coal blocks are easy to roll between the two crushing rollers, making it difficult to bear the force, resulting in poor crushing effect. In addition, the hard gangue, rock, etc. in the raw coal blocks will cause the load of the crushing rollers to increase, which may easily cause damage to the motor; although the jaw crusher and hammer crusher can avoid the above problems, the crushed particles are generally large and the particle size is difficult to control. Secondary crushing is required to reach the target particle size.
[0005] To this end, we propose a coal mine crushing device to solve the above problems. Utility Model Content
[0006] The utility model aims to solve the problems in the prior art that roller shredders are inconvenient to process raw coal blocks of special shapes and jaw crushers and hammer crushers have large crushing particle sizes, and proposes a coal mine crushing device.
[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0008] A coal mine crushing device includes a mounting frame, on which a coarse crushing assembly, a fine crushing assembly, and a power assembly are arranged, wherein:
[0009] The coarse crushing assembly includes a protective shell, a feed pipe is provided above the protective shell, a discharge port is provided at the bottom of the protective shell, and a central shaft is rotatably provided in the protective shell, and a hammer mechanism for crushing raw coal blocks is provided on the central shaft;
[0010] The fine crushing assembly includes a material guide shell installed below the protective shell and corresponding to the discharge port, two mutually parallel crushing rollers are rotatably arranged in the material guide shell, and a gear transmission structure is provided between the two crushing rollers;
[0011] The power assembly is used to drive the central shaft and the rolling roller to rotate.
[0012] Preferably, the hammer mechanism includes a plurality of mounting plates equidistantly distributed on the central axis, forming an installation space between two adjacent mounting plates, a plurality of mounting rods distributed in a circular array around the axis between the plurality of mounting plates, a breaking hammer is rotatably provided on the mounting rod, and the plurality of breaking hammers are distributed at intervals.
[0013] Preferably, two mounting rings are coaxially arranged outside the central axis, and the two mounting rings are fixedly connected to the mounting plates at corresponding positions through multiple connecting rods respectively, and multiple paddle plates are fixedly arranged between the two mounting rings.
[0014] Preferably, a plurality of equally spaced cross bars are provided in the discharge port, and a gap for the crushed coal blocks to pass through is formed between two adjacent cross bars.
[0015] Preferably, the outer peripheral surface of the rolling roller is a rough surface.
[0016] Preferably, the gear transmission structure includes a gear fixedly mounted on the rotating shaft of the rolling roller, and the two gears are meshed with each other.
[0017] Preferably, the power assembly includes a motor, a driving pulley is fixedly mounted on the output end of the motor, a double-track pulley is fixedly mounted on the central shaft, a driven pulley is fixedly mounted on one of the rolling roller shafts, and both the driving pulley and the driven pulley are connected to the double-track pulley via a belt drive.
[0018] Preferably, two inclined baffles are provided in the feed pipe, the two inclined baffles are longitudinally staggered and located on opposite sides, and the projections of the two inclined baffles in the vertical direction overlap.
[0019] In summary, the technical effects and advantages of the utility model are:
[0020] The utility model drives the breaker hammer to rotate and swing by the rotation of the central shaft, and hammers and crushes the large pieces of raw coal. The small particles of coal obtained by the crushing pass through the gaps between the cross bars to reach the rolling rollers, and are crushed by the rolling rollers to obtain coal of target particle size. It can avoid the motor overload caused by directly crushing the coal blocks, and can also break the coal blocks into irregular small pieces during the hammer crushing process, thereby reducing the occurrence of the situation where the coal blocks cannot be crushed by the force when rolling on the rolling rollers.
[0021] In the present invention, the breaker hammer is rotatably arranged on a mounting rod fixed on a mounting plate. When the central axis rotates, the breaker hammer is thrown outward by centrifugal force, and the coal blocks are crushed by the inertial force generated by the rotation of the central axis, with greater impact force. In addition, when the coal blocks are not crushed by a single hammer blow, the coal blocks fall and accumulate under the protective shell. When the breaker hammer collides with the accumulated coal blocks again, the breaker hammer itself can deflect to offset the impact, thereby reducing the risk of the breaker hammer being stuck by the coal blocks, causing the motor to overload.
[0022] The utility model provides a mounting ring and a paddle plate. When the central shaft rotates, the paddle plate rotates to lift up the coal blocks that have not met the crushing requirements and cannot fall from the gap between the cross bars, thereby increasing the contact probability of these coal blocks with the breaker hammer, thereby achieving crushing and improving the crushing effect, avoiding the situation where the coal blocks accumulate and hinder the operation of the breaker hammer, and thus reducing the impact force of the breaker hammer.
[0023] The utility model provides an inclined baffle to shield the feed pipe, thereby ensuring that the coal blocks can be fed normally and preventing the coal block fragments from jumping out when the breaker hammer crushes the coal blocks, which is beneficial to improving the safety of the device operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;
[0026] Figure 3 This is a schematic structural diagram of the coarse crushing component of the utility model;
[0027] Figure 4 This is a schematic diagram of the connection structure between the central shaft, the mounting plate and the breaking hammer in the present invention;
[0028] Figure 5 It is a structural schematic diagram of the fine crushing component of the utility model.
[0029] In the figure: 1. Mounting frame; 2. Coarse crushing assembly; 21. Protective shell; 211. Cross bar; 22. Feed pipe; 221. Inclined baffle; 23. Center shaft; 24. Mounting plate; 25. Mounting rod; 26. Breaking hammer; 27. Mounting ring; 28. Connecting rod; 29. Paddle plate; 3. Fine crushing assembly; 31. Guide shell; 32. Crushing roller; 33. Gear; 4. Power assembly; 41. Motor; 42. Drive pulley; 43. Double-track pulley; 44. Driven pulley; 45. Belt. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0031] Reference Figure 1-3 A coal mine crushing device includes a mounting frame 1, on which a coarse crushing component 2, a fine crushing component 3 and a power component 4 are arranged. After the raw coal blocks are sorted, large coal blocks are crushed by the coarse crushing component 2 to form small coal blocks, and the small coal blocks are then crushed into target particle size by the fine crushing component 3 for transportation and storage.
[0032] The coarse crushing component 2 includes a protective shell 21, a feed pipe 22 is provided above the protective shell 21, and a conveyor belt is provided on the feed pipe 22. The coal blocks are fed into the protective shell 21 through the feed pipe 22 by the conveyor belt. A discharge port is provided at the bottom of the protective shell 21, and the coarsely crushed coal blocks are discharged through the discharge port for fine crushing. A central shaft 23 is provided for rotation in the protective shell 21, and a hammer mechanism for crushing the raw coal blocks is provided on the central shaft 23. After the coal blocks enter the protective shell 21, the central shaft 23 is driven to rotate by the power component 4, so that the hammer mechanism is driven to impact and crush the coal blocks, and then they are discharged through the discharge port. The whole process is a continuous process. Therefore, the appropriate conveyor belt feeding speed can be matched according to the crushing efficiency of the hammer mechanism to achieve continuous operation.
[0033] Two inclined baffles 221 are fixedly installed in the feed pipe 22. The inclined baffles 221 are used to cushion the fall of coal blocks to prevent the coal blocks from directly entering the protective shell 21 and causing damage to the device. The two inclined baffles 221 are longitudinally staggered and located on opposite sides. The vertical projections of the two inclined baffles 221 overlap. The two inclined baffles 221 block the coal blocks, which can delay the impact force of the coal feeding. At the same time, during the coal crushing process, it can prevent coal block fragments from popping out, which is beneficial to improving the safety of the device operation.
[0034] Reference Figure 2-4 The hammer mechanism includes a plurality of mounting plates 24 equidistantly fixed on the central axis 23, forming a mounting space between two adjacent mounting plates 24, and a plurality of mounting rods 25 fixedly distributed in a circular array around the axis between the plurality of mounting plates 24. A breaking hammer 26 is rotatably provided on the mounting rod 25, and the breaking hammer 26 rotates synchronously with the central axis 23. When the breaking hammer 26 contacts the falling coal block, it impacts the coal block to achieve crushing. The mounting plates 24 can separate the various breaking hammers 26 to ensure that the various breaking hammers 26 do not affect each other during operation. During operation, the central shaft 23 rotates, driving the mounting plate 24 to rotate, and at the same time driving the breaker hammer 26 to rotate around the central shaft 23. The breaker hammer 26 swings outward under the action of inertia, which can increase the impact force and ensure the crushing effect. Multiple breaker hammers 26 are distributed at intervals. When the breaker hammer 26 fails to crush the coal block material in a single hammering, the coal block falls and accumulates under the protective shell 21. When the breaker hammer 26 collides with the accumulated coal block again, the breaker hammer 26 itself can deflect to offset the impact, thereby reducing the breaker hammer 26 from being stuck by the coal block and reducing the risk of overload of the power component 4.
[0035] Reference Figure 1-4Two mounting rings 27 are coaxially arranged outside the central axis 23. The two mounting rings 27 are fixedly connected to the mounting plates 24 at corresponding positions through multiple connecting rods 28. Multiple paddle plates 29 are fixedly arranged between the two mounting rings 27. The paddle plates 29 are close to the inner wall of the protective shell 21. When crushing, the coal blocks collide with the high-speed rotating hammer 26 during the falling process to form a crushing effect. The coal blocks that are not completely crushed will accumulate at the bottom of the protective shell 21. The traditional hammer crusher directly hits the accumulated coal blocks through the rotation of the hammer head. Impact crushing is performed, but since the hammer head is installed in a rotating manner, when the hammer head contacts the accumulated coal blocks, most of the kinetic energy of the hammer head will be unloaded, affecting the crushing effect. The mounting ring 27 is rigidly connected to the central shaft 23 by the connecting rod 28. When the central shaft 23 rotates for crushing, the mounting ring 27 drives the paddle plate 29 to rotate, and the coal blocks accumulated under the protective shell 21 are lifted up. The lifted coal blocks come into contact with the breaker hammer 26 again when falling, and are crushed until the coal blocks reach a suitable particle size and enter the fine crushing component 3 to be crushed into powder.
[0036] Reference Figure 1-4 A plurality of evenly spaced cross bars 211 are fixedly provided in the discharge port, and a gap is formed between two adjacent cross bars 211 for the broken coal blocks to pass through. The cross bars 211 play a screening role at the discharge port position, and the coal blocks need to have a particle size smaller than the gap between the cross bars 211 to be discharged from the discharge port.
[0037] Reference Figure 1 、 2 And 5, the fine crushing component 3 includes a guide shell 31 installed below the protective shell 21 and corresponding to the discharge port, and two parallel rolling rollers 32 are rotatably arranged in the guide shell 31, and a gear transmission structure is arranged between the two rolling rollers 32. The rolling rollers 32 are driven to rotate by the power component 4. Under the action of the gear transmission structure, the two rolling rollers 32 can achieve reverse rolling. The small coal blocks falling from the discharge port enter the guide shell 31 and fall between the two rolling rollers 32. The rolling rollers 32 roll together to grind the small coal blocks into coal materials of target particle size. Since there are no oversized coal blocks, the overload of the power component 4 caused by directly grinding large-volume coal blocks can be avoided, and the coal blocks crushed by hammering are generally irregular in shape. The outer peripheral surface of the rolling roller 32 is a rough surface, which reduces the occurrence of coal blocks rolling on the rolling roller 32 and unable to be crushed by force.
[0038] The gear transmission structure includes a gear 33 fixedly mounted on the rotating shaft of the laminating roller 32. The two gears 33 are meshed with each other. When one of the laminating rollers 32 rotates, the gear 33 drives the other laminating roller 32 to rotate in the opposite direction, thereby realizing the roller counter-rotation.
[0039] The power assembly 4 is used to drive the central shaft 23 and the rolling roller 32 to rotate. The power assembly 4 includes a motor 41. A driving pulley 42 is fixedly installed on the output end of the motor 41. A double-track pulley 43 is fixedly installed on the central shaft 23. A driven pulley 44 is fixedly provided on the rotating shaft of one of the rolling rollers 32. The driving pulley 42 and the driven pulley 44 are both connected to the double-track pulley 43 through a belt 45. Power is output through the motor 41. The motor 41 rotates the driving pulley 42, driving the double-track pulley 43 to rotate, providing power to the central shaft 23. The double-track pulley 43 then drives the driven pulley 44 to rotate through the belt 45, providing power to the rolling roller 32.
[0040] The working principle of this utility model is as follows:
[0041] When in use, start the motor 41, the motor 41 rotates the driving pulley 42, drives the double-track pulley 43 to rotate, provides power to the central shaft 23, and the double-track pulley 43 drives the driven pulley 44 to rotate through the belt 45, provides power to the rolling roller 32, and the raw coal blocks are fed into the protective shell 21 through the feed pipe 22. The central shaft 23 rotates, drives the mounting plate 24 to rotate, and at the same time drives the breaker hammer 26 to rotate around the central shaft 23. The breaker hammer 26 is swung outward under the action of inertia, and the breaker hammer 26 rotates synchronously with the central shaft 23. When the hammer 26 contacts the falling raw coal block, it impacts the raw coal block. At the same time, the mounting ring 27 drives the paddle plate 29 to rotate, lifting the coal blocks accumulated under the protective shell 21. The lifted coal blocks contact the hammer 26 again when falling, and are crushed. After the coal blocks reach a suitable particle size, they pass through the gap between the cross bars 211 and are discharged from the discharge port into the guide shell 31. The small coal blocks fall between the two rolling rollers 32 and are crushed into the target particle size by the rolling roller 32. They are then transported and stored.
Claims
1. A coal mine crushing device, comprising a mounting frame (1), wherein a coarse crushing assembly (2), a fine crushing assembly (3) and a power assembly (4) are arranged on the mounting frame (1), characterized in that: in: The coarse crushing assembly (2) includes a protective shell (21), a feed pipe (22) is provided above the protective shell (21), a discharge port is provided at the bottom of the protective shell (21), and a central shaft (23) is rotatably provided in the protective shell (21), and a hammer mechanism for crushing raw coal blocks is provided on the central shaft (23); The hammer mechanism comprises a plurality of mounting plates (24) equidistantly distributed on the central axis (23), forming a mounting space between two adjacent mounting plates (24), a plurality of mounting rods (25) distributed in a circular array around the axis between the plurality of mounting plates (24), a breaker hammer (26) rotatably provided on the mounting rod (25), the plurality of breaker hammers (26) being distributed at intervals, two mounting rings (27) coaxially provided outside the central axis (23), the two mounting rings (27) being fixedly connected to the mounting plates (24) at corresponding positions via a plurality of connecting rods (28), and a plurality of paddle plates (29) being fixedly provided between the two mounting rings (27); The fine crushing assembly (3) comprises a material guide shell (31) installed below the protective shell (21) and corresponding to the discharge port, two mutually parallel rolling rollers (32) are rotatably arranged in the material guide shell (31), and a gear transmission structure is provided between the two rolling rollers (32); The power assembly (4) is used to drive the central shaft (23) and the rolling roller (32) to rotate.
2. A coal mine crushing device according to claim 1, characterized in that: A plurality of equally spaced cross bars (211) are provided in the discharge port, and a gap for the crushed coal blocks to pass through is formed between two adjacent cross bars (211).
3. A coal mine crushing device according to claim 1, characterized in that: The outer peripheral surface of the rolling roller (32) is a rough surface.
4. A coal mine crushing device according to claim 1, characterized in that: The gear transmission structure comprises a gear (33) fixedly mounted on the rotating shaft of the rolling roller (32), and the two gears (33) are meshed with each other.
5. A coal mine crushing device according to claim 1, characterized in that: The power assembly (4) includes a motor (41), a driving pulley (42) is fixedly mounted on the output end of the motor (41), a double-track pulley (43) is fixedly mounted on the central shaft (23), a driven pulley (44) is fixedly mounted on the rotating shaft of one of the rolling rollers (32), and the driving pulley (42) and the driven pulley (44) are both connected to the double-track pulley (43) via a belt (45).
6. A coal mine crushing device according to claim 1, characterized in that: Two oblique baffles (221) are provided in the feed pipe (22), the two oblique baffles (221) are longitudinally displaced and located on opposite sides, and the projections of the two oblique baffles (221) in the vertical direction partially overlap.